The Suspicious Looking Eye is a consumable item that summons the Eye of Cthulhu. It is likely the first summoning item the player will obtain, and requires a Demon Altar or a Crimson Altar to craft with 6 Lens. In addition to being crafted, they can also be found in Gold/Frozen Chests in the Cavern and the Dungeon, or in Ivy Chests in the underground Jungle.
- It is possible to legitimately fight two Eyes at the same time: if the message "You feel an evil presence watching you..." appears, an Eye can be summoned, but this will not cancel out the Eye that was already set to appear, resulting in a second Eye joining the fight shortly after the first Eye spawns.
- 电脑版 1.3.1：外观更新。
- 电脑版 1.1：堆叠上限由 1 提升至 20。
- 电脑版 1.0.6：
- （英文）工具提示由“May cause terrible things to happen”变更为“Summons the Eye of Cthulhu”。